A liquefied natural gas filling station equipment unloading pipeline valve with multifunctional valve

Abstract

The utility model discloses a liquefied natural gas filling station equipment unloading pipeline valve with multifunctional valve, including unloading component, this pipeline can pass through the setting of multifunctional stop valve and solve when the stop valve opens, back pressure is too high, and the problem of medium backflow, and the integrated design of stop valve with check function can reduce the length of pipeline and need no longer set up separate check valve, also reduced the difficulty of installing valve, and two -in -one stop valve can accelerate the response speed of valve. And multifunctional stop valve can prevent liquid backflow, ensure system pressure stability, improve system safety etc.

Description

Technical Field

[0001] This utility model relates to a device, specifically a liquefied natural gas refueling station equipment unloading pipeline valve with a multi-functional valve. Background Technology

[0002] Both liquefied natural gas (LNG) and compressed natural gas (CNG) are primarily composed of methane. LNG is obtained by purifying gaseous natural gas at atmospheric pressure and cooling it to -162°C. CNG is obtained by compressing gaseous natural gas to a pressure between 20 MPa and 25 MPa. Both LNG and CNG can be used as vehicle fuel. To facilitate vehicle refueling, numerous LNG and CNG refueling stations have been built throughout China.

[0003] In the existing technology, in order to protect tank trucks from liquid backflow into their interiors, multiple valves need to be installed to achieve operation and protection. Check valves and shut-off valves need to be installed separately. This method increases the length of the pipeline and the difficulty of installation, and requires reasonable pipeline layout. Utility Model Content

[0004] The purpose of this utility model is to provide a liquefied natural gas refueling station equipment unloading pipeline valve with a multi-functional valve, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: A liquefied natural gas (LNG) refueling station equipment unloading pipeline valve with a multi-functional valve is disclosed. The unloading assembly includes an unloading liquid phase port, an unloading liquid phase pipeline, a multi-functional shut-off valve, an unloading gas phase port, an unloading gas phase pipeline, a bypass pipeline, a pressurizing liquid phase port, and a pressurizing liquid phase pipeline. The unloading liquid phase port is located on the unloading liquid phase pipeline, and a multi-functional shut-off valve is installed on the unloading liquid phase pipeline. An unloading gas phase port is located on one side of the unloading liquid phase port and is located on the unloading gas phase pipeline. A bypass pipeline is provided between the unloading gas phase pipeline and the unloading liquid phase pipeline. The connection point between the bypass pipeline and the unloading liquid phase pipeline is located on the side of the multi-functional shut-off valve near the unloading liquid phase port. A pressurizing liquid phase port is located on one side of the unloading gas phase port and is located on the pressurizing liquid phase pipeline.

[0006] As a further embodiment of this utility model: the multifunctional shut-off valve includes a valve body, a valve inlet, a valve outlet, a valve disc, a connector, a check spring, a valve core, a valve cover, a valve stem, and a handwheel. The valve body has a valve inlet and a valve outlet. The valve disc is located within the valve body. A check spring is located on the top of the valve disc, with one end of the check spring contacting the valve disc and the other end contacting the valve body. A connector is located on one side of the valve disc and is fixedly connected to the valve disc. A valve core is located on one side of the connector and is mounted on the connector. A valve cover is located on one side of the valve core, and a valve stem is located on one side of the valve cover. One end of the valve stem is fixedly connected to the valve core. A handwheel is located on one side of the valve stem and is fixedly connected to the valve stem. The handwheel is rotatably connected to the valve cover.

[0007] Compared with the prior art, the beneficial effects of this utility model are: This pipeline system utilizes a multi-functional shut-off valve to address the issue of excessive back pressure and media backflow when the shut-off valve is open. The integrated design of the shut-off valve with check valve functionality reduces pipeline length, eliminating the need for a separate check valve and simplifying valve installation. Furthermore, the two-in-one shut-off valve accelerates valve response. The multi-functional shut-off valve prevents liquid backflow, ensures stable system pressure, and enhances system safety. It also protects the tank truck from backflow of cryogenic liquefied natural gas from the storage tank during unloading due to pressure fluctuations, preventing damage to the tank truck's internal structure and related equipment, and ensuring its normal operation and lifespan. Attached Figure Description

[0008] Figure 1 This is a schematic diagram of the process flow of the unloading pipeline assembly in the unloading pipeline valve of a liquefied natural gas refueling station equipment with a multi-functional valve.

[0009] Figure 2 This is a schematic diagram of the structure of a multi-functional shut-off valve in the unloading pipeline valve of a liquefied natural gas refueling station equipment with a multi-functional valve. Detailed Implementation

[0010] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0011] Please see Figures 1-2 In this embodiment of the utility model, a liquefied natural gas refueling station equipment unloading pipeline valve with a multi-functional valve includes an unloading assembly 200.

[0012] The unloading assembly 200 includes an unloading liquid phase port 201, an unloading liquid phase pipeline 202, a multi-functional shut-off valve 203, an unloading gas phase port 204, an unloading gas phase pipeline 205, a bypass pipeline 206, a booster liquid phase port 207, and a booster liquid phase pipeline 208. The unloading liquid phase port 201 is located on the unloading liquid phase pipeline 202, and the multi-functional shut-off valve 203 is installed on the unloading liquid phase pipeline 202. An unloading gas phase is located on one side of the unloading liquid phase port 201. The unloading gas phase port 204 is located on the unloading gas phase pipeline 205. A bypass pipeline 206 is provided between the unloading gas phase pipeline 205 and the unloading liquid phase pipeline 202. The connection between the bypass pipeline 206 and the unloading liquid phase pipeline 202 is located on the side of the multi-functional shut-off valve 203 near the unloading liquid phase port 201. A pressurized liquid phase port 207 is provided on the side of the unloading gas phase port 204. The pressurized liquid phase port 207 is located on the pressurized liquid phase pipeline 208.

[0013] The multi-functional shut-off valve 203 includes a valve body 2301, a valve inlet 2302, a valve outlet 2303, a valve disc 2305, a connector 2306, a check spring 2307, a valve core 2308, a valve cover 2309, a valve stem 2310, and a handwheel 2311. The valve body 2301 has a valve inlet 2302 and a valve outlet 2303. The valve disc 2305 is located inside the valve body 2301. A check spring 2307 is located on the top of the valve disc 2305. One end of the check spring 2307 contacts the valve disc 2305, and the other end of the check spring 2307 is in contact with the valve body. 2301 Contact, a connector 2306 is provided on one side of the valve disc 2305, the connector 2306 is fixedly connected to the valve disc 2305, a valve core 2308 is provided on one side of the connector 2306, the valve core 2308 is installed and connected to the connector 2306, a valve cover 2309 is provided on one side of the valve core 2308, a valve stem 2310 is provided on one side of the valve cover 2309, one end of the valve stem 2310 is fixedly connected to the valve core 2308, a handwheel 2311 is provided on one side of the valve stem 2310, the handwheel 2311 is fixedly connected to the valve stem 2310, and the handwheel 2311 is rotatably connected to the valve cover 2309.

[0014] The working principle of this utility model is as follows: The cryogenic shut-off valve operates by rotating the valve stem, which in turn moves the valve core up and down. When the valve core rises, the valve opens, allowing the cryogenic medium to flow through the valve body's passageway. When the valve core descends, it comes into close contact with the valve seat, blocking the flow of the medium and achieving the shut-off function.

[0015] In a check valve, the valve opens when the pressure of the medium at the valve inlet is greater than the spring force within the valve body, allowing the medium to flow through the valve's internal passage. Conversely, the check valve closes when the pressure is less than the spring force.

[0016] During operation, the multi-functional shut-off valve 203 can address the issue of excessive back pressure and media backflow when the shut-off valve is open. The integrated design of the shut-off valve with check valve function reduces pipeline length, eliminating the need for a separate check valve and simplifying valve installation. Furthermore, the two-in-one shut-off valve accelerates valve response. The multi-functional shut-off valve 203 prevents liquid backflow, ensures stable system pressure, and improves system safety. It also protects the tank truck from backflow of cryogenic liquefied natural gas from the storage tank during unloading due to pressure fluctuations, preventing damage to the tank truck's internal structure and related equipment, and ensuring its normal operation and lifespan.

[0017] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A liquefied natural gas (LNG) refueling station equipment unloading pipeline valve with a multi-functional valve, comprising an unloading assembly ((200)), characterized in that, The unloading assembly (200) includes an unloading liquid phase port (201), an unloading liquid phase pipeline (202), a multi-functional shut-off valve (203), an unloading gas phase port (204), an unloading gas phase pipeline (205), a bypass pipeline (206), a booster liquid phase port (207), and a booster liquid phase pipeline (208). The unloading liquid phase port (201) is located on the unloading liquid phase pipeline (202), and the multi-functional shut-off valve (203) is installed on the unloading liquid phase pipeline (202). An unloading gas phase is located on one side of the unloading liquid phase port (201). The unloading gas phase port (204) is located on the unloading gas phase pipeline (205). A bypass pipeline (206) is provided between the unloading gas phase pipeline (205) and the unloading liquid phase pipeline (202). The connection between the bypass pipeline (206) and the unloading liquid phase pipeline (202) is located on the side of the multi-functional shut-off valve (203) near the unloading liquid phase port (201). A pressurized liquid phase port (207) is provided on one side of the unloading gas phase port (204). The pressurized liquid phase port (207) is located on the pressurized liquid phase pipeline (208).

2. The liquefied natural gas refueling station equipment unloading pipeline valve with multi-functional valve according to claim 1, characterized in that, The multi-functional shut-off valve (203) includes a valve body (2301), a valve inlet (2302), a valve outlet (2303), a valve disc (2305), a connector (2306), a check spring (2307), a valve core (2308), a valve cover (2309), a valve stem (2310), and a handwheel (2311). The valve body (2301) is provided with a valve inlet (2302) and a valve outlet (2303). The valve body (2301) is provided with a valve disc (2305). A check spring (2307) is provided on the top of the valve disc (2305). One end of the check spring (2307) is in contact with the valve disc (2305), and the other end of the check spring (2307) is in contact with the valve body. (2301) Contact, a connector (2306) is provided on one side of the valve disc (2305), the connector (2306) is fixedly connected to the valve disc (2305), a valve core (2308) is provided on one side of the connector (2306), the valve core (2308) is installed and connected to the connector (2306), a valve cover (2309) is provided on one side of the valve core (2308), a valve stem (2310) is provided on one side of the valve cover (2309), one end of the valve stem (2310) is fixedly connected to the valve core (2308), a handwheel (2311) is provided on one side of the valve stem (2310), the handwheel (2311) is fixedly connected to the valve stem (2310), and the handwheel (2311) is rotatably connected to the valve cover (2309).

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